Carbureter.



W. E. NAGEBORN.

GARBURETER. APPLICATION FILED 1130.21, 1907.

Patented June 6, 1911.

O78 M M Flttorncgs cancer.

' at Detroit, county of Wayne,

WILLIAM E. NAGEBOE'N, OF DETROIT, MICHIGAN, ASSIGNOR TO GRAY MQTOR CUM- PANY, 0F DETROIT, MICHIGAN, A CORPORATION OF'MICHIGAN.\

CARBURETER.

Specification of Letters Patent. Patented Junefi; 1911.

Application filed December. 21, 1907. Serial No. 407,598.

To all whom it may concern:

Be it known that I, WILLIAM E. NAGE- BORN, citizen of the United States, residing State of Michigan, have invented a certain new and useand declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the artto which it pertains-to make and use the same, reference being bad to the accompanying drawings, which form a part of this specification.

My invention relates to carburetors, and consists in the improvements hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1 is a section in a vertical plane of an internal combustion engine and a carbureter' embodying my invention attached thereto. Fig. 2, is an enlarged sectional view of the carbureter. Fig. 3, is a section in the plane indicated by the line. 3, 3, Fig'. 2-. Fig. i, is a section in the plane indicated by theline, 4, 4: Fig. 2.

A, is the cylinder of a gas engine and B,-is the crank caseQ C, represents the inlet apparatus which includes an inwardly opening non-return valve of the usual construction,wh ich is not shown in detail, as it is well understood.

D, is a throttle valve controlling the inlet passage 'to'the crank case B.

a is a piston adapted the cylinder A.

b, is the main shaft; 0, the connecting rod of thegas engine.

The. gas engine, as will be seen by its construction, operates as a two cycle engine.

F, is a passage leading fit-am the crank case, and G, is a passage opening into the ing T, is v of the passages F and G, and unites saidpassages so that the air compressed 1n the cylinder above the piston a, when the piston is at the end of its working stroke. The cas interposed between the outer ends crank case will flow through said casing into the cylinder above the piston a.

E, is the exhaust port.

H, indicates a port formed in the casing T midway between the passages F and G.

I, .is a valve adapted to nearly, but not quite, close the port H. The valve I, is bored out from its lower-end to form a cylindrical' cavity therein,

to reciprocate in the crank and c l,

passage Gr, the

J,J, are aperturesformed through the wvall of the valve 1, opening within its interior cavity andabovesaid valve. 7

K is ,a tube concentric with t'hevalveI and fixed to the lower part of the casing T.

L, is a valve stem eXtehding frOm the upper part of the valve I fitting to slide in the tube K.

M, is anaperture formed-through the valve stem L, and opening'at the top of the valve I, in small passages m, m'as shown in the drawings.

'The tube K, extends. above the valve seat H, and is always within the valve I, but it does not fit tightinthe cavity of said valve, but leaves some space between its outer wall and the wall of the said cavity.

andadapted P, is a conduit for the admission of the fluid constituting the fuel for the engine as, for instance, gasolene .or'kerosene, and I provide a pipe V, for gasoleneand a pipe W, for kerosenesothat either may be supplied to the engine as required. i

N, is a ball-valve opening into thehollow" of the tube K,-and' adapted to close-the inner end of the'c'onduitP; V I

Q, is a needle valve which may be-operated by the hand-wheel q, adapted to control the passage through the conduit P. v

, S, is a pointer-adapted to indicate the amount the hand-wheel g, has been turned.

' The stem 'L, rests upon the ball of the position, so as to hold, the valve I slightly ofi itsseat.

I The operation of the above described device'is as follows: 'As'rthe piston a, ascends it draws air into the crank case.B,1past the valve N, when the valve I, is. at its lowest,

throttle valve D and throughthe inlet, apparatus' C.- When, the-piston -a,, descends it compresses the air in the crank case B, and the pressure of this airlis transmitted past the valve 1,, and so that the pressure of, valve I, isjequal tothat below it. As soon. as the piston, /passes by t-l eixnouth ofthe the crank case from its seatand draws some ,fluid into the lower part of the tube K, as the stem" L, acts like a plunger in the tube K. the pressure below the piston a, on the up stroke of the same, falls the valve I, returns to its seat, forces some of through passages J, J,

the. air above the compressedair rushes from; B,raises the valve I, farther the, fuel through the passage M, and out at the passages m,

upon the surface, of said valve to be swept ofi', thls surface and vaporized by the air flowing through the passage on the down stroke of the piston.

The travel of the valve I, may be regulatedgby an adjusting screw R, adapted to contact theupper end of the valve I, to limit the upward travel of the same.v

It will be observed that by the above device the' inlet valve 1, is made to actuate a. pump for the supply of fuel to the charge.

" The fuel'for'a single charge is thrown into the passage G, or the connecting part of the casing at the commencement of or during the up-stroke of the piston and it has time to get "thoroughly heatedby contact with the walls of the passage'and by the heat of the gases insaid passage before the next'charge'of air v is passed into the cylinder so that it is easily vaporized.

I have found that by this device kerosene may be used for fuel and is thoroughly .vaporized and that the engine works well return, substantially as and for the purpose direction by the charge passing through said admission passage andto return to its normal position after the charge has passed, said part having a plunger attached thereto extending into said tube and adapted to act to force a portion of. said fluid into the admission passage for the charge, on the return motion of said part.

2. In .an internal combustion engine having a cylinder and compression chamber and adapted to compress air in said chamber and provided with. a passage for the charge between said chamber andcylinder, said'passage having a contracted portion, a valve adapted to vary the area of opening through said contracted portion and to be actuated by the charge passing th'erethrough to enlarge said opening and. to return to its normal position, a pump-adapted to deliver fuel into said passage, said valve belng so connected to said pump asto actuate'zit on its described.

3. In an internal combustion engine havprovided with a passage forthe charge between said chamber and cylinder, said passage having a contracted portion, a valve adapted to vary the area of opening through said contracted portion and to be actuated by the charge passing therethrough to enlarge said opening and to return to its nor mal position, a pump adapted to deliver fuel into said passage, said valve. being so connected to said pump as to actuate it on its return, and means for adjusting the travel of said valve. i

4:. In an internal combustion engine having a cylinder and compression chamber and adapted to compress air in said chamher and provided with a passage for the charge between said chamber and cylinder,

said passage having a contracted portion, a valve located in said passage adapted to vary the area of opening through said contracted portion andto be actuatedby the charge passing therethrough to enlarge said opening and to return to its normal position, a stem extending from said valve having a passage M therethrough, a pump cylinder K, said valve stem being adaptedto fit and reciprocate in said cylinder, substantially-as and for the purpose described.

'5. In an internal combustion engine, a passage for the admission of fluid for fuel,

a tube adapted to act as the cylinder of av pump, said passage opening into said tube, a non-return valve governing said passage, a valve to said enginehaving a stem adapted to act as a plunger in said tube, said valve to the engine being adapted to contact said non-return valve to hold the same against its seat toward the closed position of said -valve to the engine.

'6. In an internal combustion engine hav- I ing an intake passage forthe charge, a part located in said passage and adapted to be actuated in one direction by the charge passing therethrough and to return to its normal position after the charge has passed, a pump adapted to-deliver liquid fuel into said intake passage, said part being connected to said pump so as to actuate the same to deliver its charge on its return motion.

In testimony whereof, I sign this specification in the presence. of two witnesses.

ALnoIA TOWNSEND, ELLIOTT J. STonnARD. 

